Britain's 2013 Wimbledon champion Andy Murray made light work of promising Aussie teenager Nick Kyrgios, winning 6-2, 6-2 in less than an hour in the second-round of the Toronto Masters.

Meanwhile in Montreal, Australian Sam Stosur has been blown away by top seed Serena Williams, losing 6-0, 6-2 in her second round match.

Murray, the eighth seed who won the Canadian title in 2009 and 2010, had been seen as a potential scalp for the dangerous Kyrgios since losing to Bulgarian Grigor Dimitrov in the Wimbledon quarter-finals.

In the interim, the disappointed 27-year-old Scot left for his training base in Miami to try and rediscover his best form and has not competed on the ATP tour for more than a month.

He also signed former top French woman player Amelie Mauresmo to a long-term coaching contract after an experimental period through the grass season.

"I was just lacking a little bit. But after Wimbledon, I went over to Miami and I really trained like I used to for the first time since the surgery and I felt much better," said Murray.

It was solid for a first match back after sort of four and a half, five weeks. I was happy.

Andy Murray

Murray showed in Toronto that his work was starting to pay off, as he hammered Kyrgios, who upset Rafael Nadal in the fourth round at Wimbledon.

"I thought I did most things pretty solid," said Murray.

"I didn't make too many errors. I moved well, I had a high first serve percentage.

"It was solid for a first match back after sort of four and a half, five weeks. I was happy."

Murray, who has not won a title in the 13 months since lifting the Wimbledon trophy, will next face the winner of the match between Frenchman Richard Gasquet and Croatia's Ivo Karlovic.

Murray ended with four breaks of Kyrgios and was never in danger on his serve. The Scot served seven aces and 14 winners in his brief outing.

The ninth-ranked Murray, whose ranking has not been so low since 2008, improved to 33-12 on the season as he won his 16th match of 2014 on hardcourts.

Playing his first match as a married man, Djokovic, a three-time winner in Canada, needed two hours, 41 minutes and a third set tie-break to subdue the Frenchman and extend his perfect record over the feisty Monfils to 10-0.

"Well, it's a first and last time I hope I'm getting married, and of course it is different circumstances that I'm in," laughed Djokovic, who was married after claiming his seventh grand slam title at Wimbledon.

"But it's been many years already that I have been on the professional tour and with the same team of people around me who are experts in their fields ... and they are making sure I'm in the right frame of mind and in the right zone."

Since losing in the quarter-finals of the Australian Open, Djokovic had reached at least the semi-finals in all seven tournaments since, winning at Indian Wells, Miami, Rome and on the grass at Wimbledon where he reclaimed the top ranking.

Fifth seeded Spaniard David Ferrer was made to fight for his place in the third round battling to a 6-4, 2-6, 6-1 win over American qualifier Michael Russell while 12th seed Richard Gasquet rallied past Croatia's Ivo Karlovic 5-7, 7-6 (7/5), 6-3.Frenchman Julien Benneteau also advanced with a 7-6, (7/4), 6-3 upset of 11th seeded Latvian Ernests Gulbis.

Stosur and Dellacqua suffer big losses

Not even a rain delay could slow defending champion Williams in her barnstorming victory over Stosur.

Three years after falling to Stosur in the US Open final, Williams exacted brutal revenge with a 6-0, 6-2 second-round mauling in Montreal.

The world number one seized the first set, and the pair were knotted at 1-1 in the second when rain halted play.

The American showed no ill-effects when they returned to the court, wrapping up the victory over the unseeded Australian in 58 minutes.

Williams stretched her career record over Stosur to 7-3.

Fellow Australian Casey Dellacqua suffered a similar fate in her second-round match against second-seed Petra Kvitova.

Rain again disrupted the match and, crucially, Dellacqua's rhythm as her more fancied opponent dealt a crushing 6-3, 6-2 win.

Williams will now face Czech Lucie Safarova in the third round, a 6-4,6-2 winner over Slovakian Magdalena Rybarikova, while Kvitova is drawn against Russian Ekaterina Makarova.

Meanwhile, sixth-seeded German left-hander Angelique Kerber made short work of France's Caroline Garcia 6-4, 6-1 and 11th-seeded former world number one Caroline Wozniacki steamrolled Czech Klara Koukalova 6-1, 6-2.